> O_DIRECT is an argument to the "open" system call. You should do
> truss -o /tmp/out -f sqlplus "/ as sysdba" (-f option will descend into
> the forked processes) and then start the database. If the data files are
> open with the O_DIRECT flag, you have direct I/O. Alternatively, you can
> use dtrace to trap the "open" system call and see the argument values
> (Solaris 10, only). I am more of a Linux guy, Solaris is not my forte.
Thanks for the feedback. Unfortunately Solaris != Linux. O_DIRECT is
how things are done in Linux. There is no O_DIRECT for open in
Solaris. For ufs it's done on a file by file basis with directio(). Or
alternatively, you could force the whole filesystem by mounting with
the forcedirectio mount option.
Received on Fri Jul 13 2007 - 09:59:40 CDT
